Under the structural lumber classification system, what is the name of the top grade?

The top grade in the structural lumber classification system is known as Select Structural grade. This designation is reserved for lumber that meets the highest quality standards, ensuring it has the fewest defects and the highest strength. Select Structural lumber is typically used for applications that require maximum strength and reliability, such as in critical structural components of buildings, framing, and other heavy-load applications.

Understanding the grading system is essential for choosing the right lumber for specific projects. Select Structural grade offers the best performance characteristics compared to lower grades, which may allow for more defects or have less strength. This distinction is important in construction where structural integrity is paramount.